The Valve,calibrated Flow, cataloged under National Stock Number 4820-01-683-6543, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Valve,calibrated Flow
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4820-01-683-6543
Item Name
Valve,calibrated Flow
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-683-65646-3602BZ-8.00ACNPOSSIBLE MATCH
VALVE,CALIBRATED FLOW
Possible match (shared part number)Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-699-31986-3602-SK-4.00POSSIBLE MATCH
REPAIR KIT,VALVE
Possible match (shared part number)Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-713-87686-3602-SK-2.50POSSIBLE MATCH
REPAIR KIT,VALVE
Possible match (shared part number)Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-716-44346-3602-SK-4.50POSSIBLE MATCH
REPAIR KIT,VALVE
Possible match (shared part number)Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
218112681
C/1Advisory reference — outside the item-of-supply concept
U.S. Government activity
6-3602BZ-6.00ACN
3/2Design control — primary reference
U.S. Government activity
ER645-5513D42-PN-34
C/1Advisory reference — outside the item-of-supply concept
U.S. Government activity
10028432
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-683-6564POSSIBLE MATCH
VALVE,CALIBRATED FLOW
6-3602BZ-8.00ACN
4820-01-699-3198POSSIBLE MATCH
REPAIR KIT,VALVE
6-3602-SK-4.00
4820-01-713-8768POSSIBLE MATCH
REPAIR KIT,VALVE
6-3602-SK-2.50
4820-01-716-4434POSSIBLE MATCH
REPAIR KIT,VALVE
6-3602-SK-4.50
Frequently Asked Questions
What is NSN 4820-01-683-6543?
NSN 4820-01-683-6543 is a Valve,calibrated Flow, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-683-6543?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-683-6564, 4820-01-699-3198, 4820-01-713-8768. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-683-6543 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.